<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <block name="head"></block>
    <!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
    <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css">
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    <style type="text/css">
        html,
        body {
            margin: 0;
            padding: 0;
        }
    </style>
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</head>

<body>
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    <block name="footer"> </block>
</body>

<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
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<block name="script"></block>

</html>